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My uncle said to always pre-heat the sand for a core box with a torch, even in summer.
Tried it on a humid day last week and the cores came out perfect, no crumbling. Anyone else use this trick for high-humidity pours?
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the_emma6d ago
Wait you actually torched the sand in the box? That sounds like a fire hazard waiting to happen.
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rowan_reed686d ago
Just keep a fire extinguisher nearby and don't use accelerants.
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